Re: [dispatch] SIP media load balancer requirement

Dave,

Sec 3.5 of draft-partha-dispatch-siploadbalancing-survey-00 provides the existing mechanism for  SIP media load balancing. One of the solution is draft-partha-soc-overload-resource-availability-00<http://tools.ietf.org/html/draft-partha-soc-overload-resource-availability-00> but the downside is that of defining the units like CPU, Memory, DSP channels.

Please read inline for more comments.

Thanks
Partha

From: dave Cruse [mailto:davecruse1@hotmail.com]
Sent: Tuesday, May 01, 2012 1:30 PM
To: Ravindran, Parthasarathi; rmohanr@cisco.com; dispatch@ietf.org
Subject: RE: [dispatch] SIP media load balancer requirement

Hello,

I have few basic queries on this draft.

How does SIP Load balancer shift traffic from one path to another to avoid congestion on any particular

link?

<partha> Shifting the traffic will be based on the feedback from the media server and the local
Policy </partha>

How does Load balancer minimize the cost of transit across external networks OR improve network

reliability?

<partha> I could not understand in detail. Could you please explain in detail here </partha>

How is your SIP Load balancer used to implement failover of one or more of its components? Does your

components are monitored continually?

<partha> Basically, there is a need of feedback mechanism. The failover could be 503 or threshold
Limit reaching in the feedback. </partha>

How does SIP load balancer is used to monitor network activities and can it be used to split huge data

flows into several sub-flows and use several network analyzers?

<partha> In case of audio call, flow is mainly Based on SIP signaling and RTP data with the
negotiated codec. Please explain the actual huge data flow and its subflow.  </partha>

How can you achieve SIP based load balancing for media servers like PSTN-SIP GW, SBC,vOICE Gateway etc.
<partha> One of the mechanism is mentioned in http://tools.ietf.org/html/draft-partha-soc-overload-resource-availability-00 </partha>

Regards
- Dave
> From: pravindran@sonusnet.com<mailto:pravindran@sonusnet.com>
> To: rmohanr@cisco.com<mailto:rmohanr@cisco.com>; dispatch@ietf.org<mailto:dispatch@ietf.org>
> Date: Thu, 5 Jan 2012 06:28:22 +0000
> Subject: Re: [dispatch] SIP media load balancer requirement
>
> Hi Ram,
>
> Nice to see your interest. Please read inline for more comments.
>
> Thanks
> Partha
>
> >-----Original Message-----
> >From: Ram Mohan R (rmohanr) [mailto:rmohanr@cisco.com]
> >Sent: Thursday, January 05, 2012 11:45 AM
> >To: Ravindran, Parthasarathi; dispatch@ietf.org<mailto:dispatch@ietf.org>
> >Subject: RE: [dispatch] SIP media load balancer requirement
> >
> >Hi Partha,
> >
> >I would be interested in this work. See more inline
> >
> >> -----Original Message-----
> >> From: dispatch-bounces@ietf.org<mailto:dispatch-bounces@ietf.org> [mailto:dispatch-bounces@ietf.org] On
> >> Behalf Of Ravindran, Parthasarathi
> >> Sent: Thursday, December 22, 2011 8:02 AM
> >> To: dispatch@ietf.org<mailto:dispatch@ietf.org>
> >> Subject: [dispatch] SIP media load balancer requirement
> >>
> >> Hi all,
> >>
> >> As a continuation of IETF-81 Dispatch minutes
> >> (http://www.ietf.org/mail-archive/web/dispatch/current/msg03742.html)
> >> about SIP load balancing, I thought of discussing about SIP media
> >> servers load balancing as mentioned in the SIP load balancing proposed
> >> charter (http://www.ietf.org/mail-
> >> archive/web/dispatch/current/msg03615.html).
> >>
> >> "As SIP request resource consumption in SIP signaling only server
> >> varies drastically from SIP media servers [3], should the solution be
> >> split such that load balancing of a pure signaling server is different
> >> than that of a SIP server that handles signaling as well as media?"
> >>
> >> SIP media server load balancing solution will be different from
> >> signaling only because the downstream resource consumption is mainly
> >> because of media (RTP) than signaling (SIP) and the units to indicate
> >> the load balancing information will be different in both solution.
> >> There is a need to indicate those media resource consumption to the
> >> load balancer in the standard manner. Please let me know your comment
> >> on this.
> >
> >I think what we need is some text/document saying how media overload is
> >different from signaling overload and what are the different resources
> >that need to considered for media overload. In that way we will have
> >good starting point to discuss on this topic.
>
> <partha> The focus of this charter is about SIP media load balancing and not media overload handling. I agree with you that SIP media load balancing algorithm works in conjunction with media overload mechanism and selection of the load balancing algorithm majorly depends upon media overload mechanism.
>
> SIP media load balancer requirement is to consider media resource consumption of the peer apart from the signaling resource consumption. </partha>
>
> >
> >Regards,
> >Ram
> >>
> >> Thanks
> >> Partha
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